SYNONYMY NOTE: rude, in this comparison, implies a deliberate lack of consideration for others' feelings
and connotes, especially, insolence, impudence, etc. [it was rude of you to ignore your uncle]; ill-mannered connotes ignorance of the amenities of social behavior rather than deliberate rudeness
[a well-meaning but ill-mannered fellow]; boorish is applied to one who is rude or ill-mannered in a coarse, loud, or overbearing way;
, impolite implies merely a failure to observe the forms of polite society [it would be impolite to leave so early]; discourteous suggests a lack of dignified consideration for others [a discourteous reply]; uncivil implies a disregarding of even the most elementary of good manners [her uncivil treatment of the waiter]